A middle-aged man time travels to the past to become a teacher to his 17-year-old classmates. Hao Hui Gui is a 36-year-old high school teacher who is still single. During a gathering, he gets into a huge disagreement with everyone present and even gets into a fistfight with his best friend. Upon returning home, he mindlessly flips through his personal diary from 20 years ago and starts to recall many memories from the past. He falls asleep eventually and meets with his younger self in his dreams.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Episode 1 | 2019-09-09 | 45 min |
| Season 1 | Episode 2 | Episode 2 | 2019-09-09 | 45 min |
| Season 1 | Episode 3 | Episode 3 | 2019-09-10 | 45 min |
| Season 1 | Episode 4 | Episode 4 | 2019-09-10 | 45 min |
| Season 1 | Episode 5 | Episode 5 | 2019-09-11 | 45 min |
| Season 1 | Episode 6 | Episode 6 | 2019-09-11 | 45 min |
| Season 1 | Episode 7 | Episode 7 | 2019-09-16 | 45 min |
| Season 1 | Episode 8 | Episode 8 | 2019-09-16 | 45 min |
| Season 1 | Episode 9 | Episode 9 | 2019-09-17 | 45 min |
| Season 1 | Episode 10 | Episode 10 | 2019-09-17 | 45 min |
| Season 1 | Episode 11 | Episode 11 | 2019-09-18 | 45 min |
| Season 1 | Episode 12 | Episode 12 | 2019-09-18 | 45 min |
| Season 1 | Episode 13 | Episode 13 | 2019-09-23 | 45 min |
| Season 1 | Episode 14 | Episode 14 | 2019-09-23 | 45 min |
| Season 1 | Episode 15 | Episode 15 | 2019-09-24 | 45 min |
| Season 1 | Episode 16 | Episode 16 | 2019-09-24 | 45 min |
| Season 1 | Episode 17 | Episode 17 | 2019-09-25 | 45 min |
| Season 1 | Episode 18 | Episode 18 | 2019-09-25 | 45 min |
| Season 1 | Episode 19 | Episode 19 | 2019-09-30 | 45 min |
| Season 1 | Episode 20 | Episode 20 | 2019-09-30 | 45 min |
| Season 1 | Episode 21 | Episode 21 | 2019-10-01 | 45 min |
| Season 1 | Episode 22 | Episode 22 | 2019-10-01 | 45 min |
| Season 1 | Episode 23 | Episode 23 | 2019-10-02 | 45 min |
| Season 1 | Episode 24 | Episode 24 | 2019-10-02 | 45 min |
| Season 1 | Episode 25 | Episode 25 | 2019-10-07 | 45 min |
| Season 1 | Episode 26 | Episode 26 | 2019-10-07 | 45 min |
| Season 1 | Episode 27 | Episode 27 | 2019-10-08 | 45 min |
| Season 1 | Episode 28 | Episode 28 | 2019-10-08 | 45 min |
| Season 1 | Episode 29 | Episode 29 | 2019-10-09 | 45 min |
| Season 1 | Episode 30 | Episode 30 | 2019-10-09 | 45 min |
| Season 1 | Episode 31 | Episode 31 | 2019-10-14 | 45 min |
| Season 1 | Episode 32 | Episode 32 | 2019-10-14 | 45 min |
| Season 1 | Episode 33 | Episode 33 | 2019-10-15 | 45 min |
| Season 1 | Episode 34 | Episode 34 | 2019-10-15 | 45 min |
| Season 1 | Episode 35 | Episode 35 | 2019-10-16 | 45 min |
| Season 1 | Episode 36 | Episode 36 | 2019-10-16 | 45 min |